Smoke-consuming device for locomotives



T. K. BISHOP.- SMOKE CONSUMING DEVICE FOR LOCOMOTIVES.

APPLICATION FILED APR.12. 1917.

1 48,537, Patented Aug. 3, 1920 Menu/1.

THOMAS K. BISHOP, OF POWELL STATION, TE1\TNESSEE."

SMOKE-GONSUMING DEVICE FOR LOCOMOTIVES.

Specification of Letters Patent.

Patented Aug. 3,19

Application filed April 12, 1917. Serial No. 161,535.

To all whom it may concern.

Be it known that I, THoMAs K. BrsHor, a citizen of the United States, and resident of Powell Station, in the county of Knox and State of Tennessee, have invented certain new and useful Improvements in Smoke-Consuming Devices for Locomotives,

of which the following is a specification.

The present invention relates to new and:

useful improvements in smoke consuming devices for furnaces, and is more partic'u larly directed to that type of smokeconsuming device for use on railway locomotivesand including means for conveying the smoke and gases back over the boiler.

The primary object of my invention is to provide a device of the character mentioned whereln the gases Wlll be prevented from direct escape whlle the engine 1s operating and be directed back over the boiler in asupplemental chamber thus reducing the natural heat radiation and increasing the heating surface. '1

A still further ob ect of my invention is to provide an exhaust pipe having means associated therewith to automatically di rect the gases back over the boiler -while the engine is operating and also to automatically permit the direct escape of the gases When the engine is idle.

A still further object of the invention is to provide a novel apparatus of the char-" acter described, that is automatically op-' erated, eflicient in operation, and strong and durable in use.

Other improvements and novel details in the construction and arrangement of the various parts of the apparatus will be brought out more in detail in the description to follow, which, for a clear under standing of the invention, should be considered in connection with the accompanying drawing, forming a part hereof, and wherein are disclosed, for the purpose of illustration, convenient and satisfactory embodiments of the invention. It is tobe noted in this connection, changes in the construction and arrangement of the parts may be made 'Wltl10l1t departing from-the spirit of the invention-or the principle of operation of thevarious' parts.

In the drawing:

Figure 1 is a partly diagrammatic side elevational view of a railway locomotive equipped with the present smoke consumthat minor ing apparatus, and Withthe front portion of the locomotive broken away to more clearly disclose the structure, the apparatus being shown in raised position, while the engine is running, and

Fig. 2 is a transverse Vertical section through the smoke box, the'same being in p the other position, drifting.

Referring to the drawings in detail, 10 designates generally the shell ofa locomo when the engine is tive, in the front end of which is formed the usual smoke chamber or box 11 between the front wall 12 of the boiler and front wall '13 of said shell. The gas fiues are Area oFicE.

designated l i which convey the smoke and I gases from the fire box or chamber, not shown, to the smoke chamber or box 11.

A smoke or gas retarder in theform of a pipe 15 slidably extendsupwardly through the smoke chamber or box 11 above men tioned in alinement with the upper wall of the smoke stack 16. This pipe has its lower end formed with an opening A, for a purpose presently described.

A supplemental chamber is provided by means of the shell 17 mounted within the shell 10. The chamber thus formed isdivided into upper and lower compartments 25 by means of the baflie plates 18 extending longitudinally of the chamber on each side thereof. These 'bafiie plates 18 extend from the'frontfend of the shell 10 longitudinally for a major portion of the length thereof, so that communication is had between the upper andlo'wer compartments 25 at the rear end of the shell 10 beyond the baffle plates.

The usual steam exhaust nozzle 19 is mounted in the smoke box or chamber 11 and rises vertically therein, the upper end of the said nozzle, being reduced at 20 to be received in the opening A when the pipe 15 is in lowered position for a purpose presently described.

Within the lower portion of the pipe 15 is a disk 21 having a relatively small orifice 22 which is of considerably less size than the opening A, the disk being spaced from the perforated end of the pipe 15 to provide a pressure chamber therein above the opening A.

' Formed in the shell 17 near the forward end of the locomotive are openings 23 for establishing communication between the smoke box or chamber 11 and the lower compartment 25. Arranged within the' position establishes communication between the stack 16 and the upper compartment 25 and on the lowering of thesaid pipe 15 the openings 24 establish communication between-the stack 16 and the smoke box or chamber 11. The automatic operation of the pipe 15 is as follows:

'When the engine is operating the exhaust steam from the nozzle 19 acts directly upon the pipe 15 to'automatically raise the same thereby positioning the openings 24 in alinement withthe upper compartment 25 so that gases from the fines 14 will pass through the openings 23 to the lower compartment 25 thence rearwardly of the locomotive or shell 10 beyond the rear ends of the baliles 18 thence upwardly into the upper compartment 25 through the openings 24 into the stack 16. The pipe 15 is normally in lowered position when the engine is dead or drifting.

The openings 24 are then below the line of the inner shell 17 of the smoke box or chamber 11 or in communication with the smoke box 11. The products of combustion then pass from the flues 14 directly to the smoke stack 16.

WVhen the engine starts to exhaust the force of the exhaust lifts the pipe 15 and disposes the openings 24 in communication with the passageway or upper compartment 25. The orifice 22 is comparatively small and only a small portion of the exhaust will pass through just enough to'hold the pipe 15 in upper position, but the greater bulk of the exhaust will be diverted through the openings 23 and thence around the baflle plate 18 and through the openings 24 to the stack 16.

The relatively small orifice 22 will cause the exhaust to act as a blower to accelerate the blast through the stack and produce a strong suction through the stack 16. lVhen the exhaust ceases again the pipe 15 drops as before and opens communication again directly with the stack 16. The small orifice 22 is in constant communication with the pipe 15 and stack 16, hence the action of the usual blower is not interfered with by its pressure either up or down.

The stop 26 is positioned in the stack 16 to limit the upward sliding movement of the pipe 15 when acted upon by the steam from the steam exhaust nozzle 19, thus limiting the sliding movement of the pipe 15 in one direction in the automatic action thereof.

Having thus fully described my invention.

operated in a what I claim as new and desire to secure by Letters Patent, is

1. The combination with a locomotive having a tube boiler and an inner shell circumfercntiallyof the latter forming a space therein, and also a smoke box and stack forwardly of the boiler, of battle plates ar ranged within the space to divide the same into upper and lower compartments, said inner shell having openings establishing communication between the smoke box and the lower compartment, a steam exhaust nozzle arranged within thesmoke box, a pipe slidablyffitted in the inner shell and the smoke stack directly above the steam exhaust nozzle and having an opening in its lower inner: end, means within the pipe for retarding steam admitted thereto from the steam exhaust nozzle to provide back pressure within said pipe, said pipe having a plurality of openings near its upper end to alternately establish communication betweenthe smoke boxand the stack and. also communication with the upper compartment and said stack, and means for limiting the sliding movement of said pipe.

2. In combination, a locomotive boiler having a double wall structure arranged to provide a draft space,a steamexhaust nozzle, an exhaust pipe slidably fitted in the boiler smoke stack and passed through the double wall structure and having circumferentially disposed openings in its upper portion and a contracted opening in the lower end of the pipe, and means within the lower en'dof the pipe to effect back pressure of steam therein for the automatic raising of the pipe on the exhaust of steam from the nozzle.

3. The combination with .a locomotive boiler having a double wall structure arranged to provide a draft space, of a steam exhaust nozzle, an exhaust pipe slidably fitted in the boiler smoke stack and passed through the double wall structure and having circumferentially disposed openings in its upper portion and a single contracted opening in the lower end, and a disk within the pipe spaced from its lower end and having an opening therein of less diameter than the contracted opening to efliect back pressure of steam from the steam exhaust nozzle for the automatic raising of the pipe, the openings in the upper portion of the pipe beingdesigned to alternately establish communication between the smoke box and the boiler smoke stack and thedraft space and said stack. V

4. The combination with a locomotive boiler and a steam exhaust nozzle therein, of a pipe slidably fitted in the stack of the boiler and having an opening in its lower end and also provided with circumferentially disposed openings formed in the upper portion thereof, the pipe being located above the exhaustnozzle, a shell interiorly of the locomotive boiler to form an annular space, battle plates arranged longitudinally between the shell and said boiler for dividing the space into upper and lower compartments, said shell having a plurality of openings in said forward end for establishing communication between the smoke box and the lower compartment, a disk mounted in the lower portion of the pipe and having an opening of considerably less size than the opening in the bottom thereof to effect back pressure of steam in the pipe from said steam exhaust nozzle for the automatic raising of the pipe, and a stop for limiting the sliding movement of the pipe.

5. The combination with a locomotive boiler having a smoke stack and smoke box togther with a steam exhaust nozzle arranged within the smoke boX, of an inner shell within the boiler to form a draft space and having openings communicating with the smoke box, means located within the smoke stack and passed through the inner shell for alternately establishing communication between the draft space and' said stack and the smoke boxand the smoke stack and automatically controlled by the exhaust e of steam from the steam exhaust nozzle.

In testimony whereof I afiix my signature hereto.

THOMAS K. BISHOP. 

